Straight pull type rotary feeding mechanism for plunger assembly spinning closing-in

Abstract

The utility model relates to the technical field of plunger assembly closing-in devices, in particular to a straight pull type rotary feeding mechanism for plunger assembly spinning closing-in, which comprises a rack, a chuck mechanism, a chuck straight pull mechanism and a clamping mechanism arranged in the chuck mechanism and used for clamping a plunger assembly. The chuck mechanism comprises a backward pulling chuck, at least two movable clamping jaws are arranged on the backward pulling chuck, and rolling mechanisms are fixed to the movable clamping jaws. The chuck straight-pull mechanism comprises a straight-pull driving mechanism, a chuck pull rod, an upper jacking plate and a guide shaft, the straight-pull driving mechanism is connected with the upper jacking plate by connecting the guide shaft, the top of the chuck pull rod is connected with the movable clamping jaw, and the bottom of the chuck pull rod is connected with the upper jacking plate. The straight pulling driving mechanism drives the chuck pull rod to move up and down and drives the movable clamping jaw and the rolling mechanism to move in the radial direction of the backward pulling chuck to be close to or away from the plunger assembly. The plunger assembly spinning mechanism is high in spinning feeding synchronization precision, and the technical problems that an existing plunger assembly spinning mechanism is poor in spinning feeding synchronization precision, large in equipment size and high in manufacturing cost can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger assembly closing devices, in particular to a straight-pull type rotary feeding mechanism for the spinning closing of a plunger assembly. Background Art

[0002] The plunger pump is widely used in hydraulic presses, engineering machinery, agricultural machinery, ships and other industries due to its compact structure, small volume per unit power, light weight, high working pressure, high efficiency and convenient adjustment. The plunger assembly is the core component of the plunger pump, including the plunger and the sliding shoe. Before the plunger assembly is installed in the plunger pump, the plunger and the sliding shoe need to be closed to achieve a ball joint connection.

[0003] The plunger assembly can be closed by spinning to close the ball socket of the sliding shoe and the ball head of the plunger. The traditional spinning mechanism uses a central clamping mechanism to clamp the plunger assembly, and the central clamping mechanism is installed in the inner cavity in the middle of the hollow chuck. The rolling mechanism is connected to the movable claw of the chuck, and then driven by two or more independent pneumatic, hydraulic or motor screws, so that the plunger assembly to be processed is clamped on a main shaft for rotation; while the plunger assembly rotates, the movable claw of the chuck is radially fed to achieve the rolling action, so as to achieve the purpose of closing the plunger assembly. However, the synchronization accuracy of each mechanism in this rolling closing method is poor, and the existence of multiple power sources makes the structure of the device not compact, occupies a large space, and has high design and manufacturing costs. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a straight-pull rotary feed mechanism for the spinning and closing of a plunger assembly, which has high spinning feed synchronization accuracy, compact mechanical structure, good rigidity, small space volume and low manufacturing cost. It can effectively solve the technical problems of poor spinning feed synchronization accuracy, large structural volume and high manufacturing cost in the existing spinning mechanism of the plunger assembly.

[0005] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0006] In one technical solution of the utility model, a straight-pull rotary feeding mechanism for a plunger assembly for spinning and closing a mouth is provided, comprising a frame, an internally hollow chuck mechanism connected to the frame, a chuck straight-pull mechanism arranged below the chuck mechanism, and a clamping mechanism sleeved in the inner cavity of the chuck mechanism, wherein the top of the clamping mechanism clamps the plunger assembly;

[0007] The chuck mechanism comprises a rear pull chuck, the top of which is provided with at least two movable claws at equal intervals along the circumference, and each movable claw is fixedly connected with a group of rolling mechanisms;

[0008] The chuck straight-pull mechanism comprises a straight-pull drive mechanism, a chuck pull rod, an upper lift plate and a guide shaft, wherein the straight-pull drive mechanism is connected to the upper lift plate by connecting the guide shaft, the chuck pull rod is vertically sleeved on the outside of the clamping mechanism, the top of the chuck pull rod extends into the inside of the rear pull chuck to connect with the movable claw, and the bottom of the chuck pull rod is connected to the upper lift plate;

[0009] The straight-pull driving mechanism drives the chuck pull rod to move up and down in the vertical direction, and drives the movable claw to move along the radial direction of the rear-pull chuck, and at the same time the movable claw drives the rolling mechanism to approach or move away from the plunger assembly.

[0010] The above technical solution is adopted to set a chuck straight-pull mechanism connected to the back-pull chuck, the top of the chuck pull rod is connected to the movable claw in the back-pull chuck, and the bottom is connected to the straight-pull drive mechanism through the upper lifting plate and the guide shaft, and the chuck pull rod is driven up and down in the vertical direction by the straight-pull drive mechanism, so that the transmission mechanism inside the back-pull chuck drives the movable claw to move and feed in the radial direction, so as to approach the plunger assembly to roll and close it. This solution adopts a unidirectional power source, which can make the mechanical structure more compact, the feeding accuracy is higher, and digital automated precision control can be realized, thereby improving the closing accuracy of the plunger assembly.

[0011] Furthermore, the straight-pull drive mechanism includes a motor mounting frame fixed under the frame, a straight-pull motor and a screw transmission mechanism are provided under the motor mounting frame, the straight-pull motor and the screw transmission mechanism are connected by a transmission belt to achieve synchronous linkage, the bottom of the guide shaft passes through the frame and is connected to a lower lifting plate, and the lower lifting plate is connected to the screw transmission mechanism.

[0012] In the above scheme, the straight-pull motor drives the screw transmission mechanism through the transmission belt to achieve synchronous linkage with it. The screw transmission mechanism rotates to drive the lower lifting plate to move up and down in the vertical direction, thereby transmitting power through the guide shaft and the upper lifting plate to control the chuck pull rod to move up and down in the vertical direction, thereby driving the active claw on the rear pull chuck to move along the radial direction of the rear pull chuck through the inclined column sliding mechanism inside the rear pull chuck to achieve inward closing or outward opening, and the active claw drives the rolling mechanism to approach or move away from the plunger assembly.

[0013] Furthermore, the motor shaft end of the straight-pull motor is fixedly connected to a driving wheel, and the screw transmission mechanism includes a ball screw, a screw nut assembly sleeved on the outside of the ball screw, a slider fixedly connected to the screw nut assembly, and a slide rail slidably connected to the slider and vertically arranged. A connecting support plate is vertically fixedly connected to the bottom of the motor mounting frame, the slide rail is fixed to the connecting support plate, the screw nut assembly is fixedly connected to the lower lifting plate through a rib plate, and a driven wheel is fixedly connected to the top of the ball screw, and the driven wheel is connected to the driving wheel through a transmission belt.

[0014] In the above scheme, the driving wheel is driven to rotate by the direct-pull motor, and the driven wheel is driven to rotate synchronously by the transmission belt, thereby driving the ball screw to rotate along its own axis, and the screw nut assembly mounted on the outside of the ball screw moves up and down along the axial direction of the ball screw, and the screw nut assembly drives the lower lifting plate to move up and down in the vertical direction, thereby transmitting power through the guide shaft and the upper lifting plate, controlling the chuck pull rod to move up and down in the vertical direction, and driving the movable claw and the rolling mechanism to move along the radial direction of the rear pull chuck to approach or move away from the plunger assembly.

[0015] Furthermore, the top of the ball screw is sleeved with a screw bearing seat, which is fixedly connected to the motor mounting frame; the bottom of the connecting support plate is connected to a connecting base plate, the bottom of the ball screw is rotatably connected to a screw support seat, and the screw support seat is fixedly connected to the connecting base plate.

[0016] Furthermore, a pull rod bearing seat is sleeved and clamped on the bottom of the chuck pull rod, and the pull rod bearing seat is fixedly connected to the upper lifting plate, thereby realizing a detachable fixed connection between the chuck pull rod and the upper lifting plate.

[0017] Furthermore, the chuck mechanism also includes a chuck spindle and a chuck bearing seat coaxial with the rear pull chuck, the chuck spindle is fixedly connected to the bottom of the rear pull chuck, the chuck pull rod is coaxially arranged inside the chuck spindle, the chuck bearing seat is sleeved outside the chuck spindle, and the chuck bearing seat is fixedly connected to the frame;

[0018] A coaxial synchronous pulley is fixed at the bottom of the chuck main shaft, and a three-phase asynchronous motor is provided on the side of the frame, and the motor output shaft of the three-phase asynchronous motor is connected to the synchronous pulley through a synchronous belt drive. The three-phase asynchronous motor drives the synchronous pulley to rotate around its own axis, and at the same time drives the chuck main shaft and the rear pull chuck to rotate synchronously, and at the same time drives the rolling mechanism to rotate circumferentially around the plunger assembly, spin-pressing the edge of the sliding shoe to make the ball socket of the sliding shoe and the ball head of the plunger tightly fit.

[0019] Furthermore, a chuck ball bearing is sleeved between the chuck bearing seat and the chuck main shaft to reduce the friction of the chuck main shaft during the rotation process inside the chuck bearing seat and improve the flexibility of rotation. A bearing end cover and a locking ring are provided at the bottom of the chuck ball bearing, the bearing end cover is fixed to the bottom of the chuck bearing seat, and the locking ring is sleeved on the outside of the chuck main shaft and fixedly connected thereto, thereby limiting the installation position of the chuck ball bearing.

[0020] Furthermore, the frame includes an upper fixed plate, a lower fixed plate and four support columns, the upper and lower ends of the support columns are respectively fixedly connected to the upper fixed plate and the lower fixed plate, the chuck bearing seat is connected to the upper fixed plate, the guide shaft is connected to the lower fixed plate, and a guide bearing seat is sleeved between the guide shaft and the lower fixed plate to reduce friction resistance and wear therebetween, the upper lifting plate is located between the upper fixed plate and the lower fixed plate, and the straight pull drive mechanism is arranged below the lower fixed plate.

[0021] Furthermore, the rolling mechanism includes a cutter head and a rolling wheel, the cutter head is fixedly connected to the movable claw, and the rolling wheel is arranged at one end of the cutter head close to the plunger assembly for spinning and closing the plunger assembly.

[0022] Furthermore, the clamping mechanism includes a collet, a push rod fixedly connected to the bottom of the collet, and a clamping height adjustment mechanism connected to the push rod, the plunger assembly is inserted in the collet, and the clamping height adjustment mechanism is connected to the frame and is used to adjust the height position of the push rod and the collet in the vertical direction.

[0023] The beneficial effects of the utility model are as follows:

[0024] The utility model provides a straight-pull rotary feeding mechanism for the spinning closing of a plunger assembly, which has high feeding accuracy, compact structure, small occupied space and low manufacturing cost, and can significantly improve the outer contour and axial clearance of the rolling closing part of the plunger assembly. The utility model utilizes a standardized hollow rear-pull chuck as the main actuator for rolling synchronous feeding, and a chuck straight-pull mechanism that can drive the movable claw on the rear-pull chuck to feed is arranged below the rear-pull chuck, and the straight-pull motor drives the screw transmission mechanism to be synchronously linked, thereby driving the lower lifting plate, the guide shaft, the upper lifting plate and the chuck pull rod to move up and down in the vertical direction, and the chuck pull rod drives the movable claw to move along the rear-pull chuck in its radial direction through the inclined column sliding mechanism connected to the inside of the rear-pull chuck, so as to achieve inward closing or outward opening, and the movable claw drives the rolling mechanism to approach or move away from the plunger assembly; at the same time, the three-phase asynchronous motor drives the synchronous pulley to drive the chuck main shaft and the rear-pull chuck to rotate synchronously, which can drive the rolling mechanism to rotate circumferentially around the plunger assembly, close and enclose the plunger assembly, correct the contour and control the axial clearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a three-dimensional structural schematic diagram of a straight-pull type rotary feed mechanism for a plunger assembly for spinning and closing;

[0027] Figure 2It is another three-dimensional structural schematic diagram of a straight-pull type rotary feed mechanism for a plunger assembly spin-pressing and closing;

[0028] Figure 3 It is a front view of the straight-pull rotary feed mechanism for the spinning and closing of the plunger assembly;

[0029] Figure 4 yes Figure 3 Schematic diagram of the cross section along the "AA" line;

[0030] Figure 5 It is a left view of the straight pull type rotary feed mechanism for the spinning and closing of the plunger assembly;

[0031] Figure 6 yes Figure 5 The schematic cross-section diagram along the “BB” line;

[0032] Figure 7 It is a three-dimensional structural schematic diagram of the chuck straight-pull mechanism in the utility model;

[0033] Figure 8 It is a three-dimensional structural schematic diagram of the direct-pull driving mechanism in the utility model;

[0034] Fig. 9 It is a schematic diagram of the connection structure of the driving wheel and the driven wheel in the direct-pull driving mechanism of the utility model;

[0035] Fig.10 It is a schematic diagram of the connection between the chuck pull rod and the inclined column sliding mechanism in the rear pull chuck in the utility model;

[0036] Fig.11 It is a three-dimensional structural schematic diagram of a plunger assembly spinning and closing machine including a straight-pull type rotary feed mechanism;

[0037] Fig.12 It is a schematic diagram of the internal structure of a plunger assembly spinning and closing machine including a straight-pull rotary feed mechanism.

[0038] Description of the numbers in the figure:

[0039] 1. Frame; 11. Upper fixing plate; 12. Lower fixing plate; 13. Support column;

[0040] 2. Chuck mechanism; 21. Pull-back chuck; 211. Movable claw; 212. Inclined column sliding mechanism; 22. Chuck spindle; 23. Chuck bearing seat; 24. Synchronous pulley; 25. Synchronous belt; 26. Chuck ball bearing; 27. Bearing end cover; 28. Locking ring;

[0041] 3. Chuck straight-pull mechanism; 31. Straight-pull drive mechanism; 311. Motor mounting bracket; 312. Straight-pull motor; 313. Screw transmission mechanism; 3131. Ball screw; 3132. Screw nut assembly; 3133. Slider; 3134. Slide rail; 3135. Connecting support plate; 3136. Screw bearing seat; 3137. Connecting bottom plate; 3138. Screw support seat; 314. Transmission belt; 315. Driving wheel; 316. Driven wheel; 317. Rib plate; 32. Chuck pull rod; 33. Upper lifting plate; 34. Guide shaft; 35. Lower lifting plate; 36. Pull rod bearing seat; 37. Guide bearing seat;

[0042] 4. Clamping mechanism; 41. Collet; 42. Ejector rod; 43. Clamping height adjustment mechanism; 431. Clamping servo motor; 432. Screw rod; 433. Nut; 434. Screw rod mounting seat; 435. Sliding seat; 436. Moving block;

[0043] 5. Rolling mechanism; 51. Cutter head; 52. Rolling wheel; 6. Three-phase asynchronous motor;

[0044] 100. Plunger assembly; 101. Plunger; 102. Shoe. DETAILED DESCRIPTION

[0045] The following is a specific embodiment of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, it does not mean that the features of this utility model are limited to the embodiment.

[0046] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top", "bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0047] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0048] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0049] refer to Figure 1 In one technical solution of the utility model, a straight-pull rotary feed mechanism for a plunger assembly is provided, comprising a frame 1, an internally hollow chuck mechanism 2 connected to the frame 1, a chuck straight-pull mechanism 3 arranged below the chuck mechanism 2, and a clamping mechanism 4 sleeved in the inner cavity of the chuck mechanism 2, wherein the top of the clamping mechanism 4 clamps a plunger assembly 100.

[0050] In this embodiment, reverse closing is taken as an example. The clamping mechanism 4 clamps the bottom of the sliding shoe 102, and the ball head of the plunger 101 is placed downwardly inside the upward ball socket of the sliding shoe 102. The edge of the ball socket of the sliding shoe 102 is rolled inward to make it wrap around the outside of the ball head of the plunger 101 to achieve the purpose of closing the plunger assembly.

[0051] refer to Figure 1 and Figure 3 The chuck mechanism 2 includes a back-pull chuck 21, and at least two movable claws 211 are provided at equal intervals along the circumference of the top of the back-pull chuck 21, and a group of rolling mechanisms 5 are fixedly connected to each movable claw 211. The back-pull chuck 21 in this embodiment can adopt the existing synchronous self-centering inclined column type hollow back-pull chuck, which reduces the manufacturing cost and improves the contour (circle) of the rolling plunger assembly.

[0052] refer to Figure 1 , Figure 2 and Figure 7 The chuck straight-pull mechanism 3 includes a straight-pull drive mechanism 31, a chuck pull rod 32, an upper lift plate 33 and four sets of guide shafts 34. The straight-pull drive mechanism 31 is arranged below the frame 1 and is connected to the upper lift plate 33 by connecting the guide shafts 34. The chuck pull rod 32 is vertically sleeved on the outside of the clamping mechanism 4. The top of the chuck pull rod 32 extends into the interior of the rear-pull chuck 21 and is connected to the movable claw 211 through the inclined column sliding mechanism 212 connected to the interior of the rear-pull chuck 21. The bottom of the chuck pull rod 32 is connected to the upper lift plate 33.

[0053] The key point of the design of the utility model is to set the chuck straight-pull mechanism 3 to move up and down in the vertical direction, thereby driving the rear-pull chuck 21 to realize the opening and closing of the movable claw 211. Figure 6 The internal structure of the rear pull chuck 21 is omitted, and can be referred to Fig.10, the oblique column sliding mechanism 212 is respectively connected to the chuck rod 32 and the movable claw 211. The rear pull chuck 21 converts the axial movement into the radial movement of the movable claw 211 through the connection between the chuck rod 32 and the oblique column sliding mechanism 212, so that the movable claw 211 is clamped inward to approach the plunger assembly 100 for spinning and closing, or the movable claw 211 is opened outward to separate from the plunger assembly 100 after the closing is completed. The oblique column sliding mechanism 212 inside the rear pull chuck 21 adopts the existing structure, and the structural principle of this part is a relatively mature technology and will not be repeated.

[0054] refer to Figure 4 The straight-pull driving mechanism 31 drives the chuck pull rod 32 to move up and down in the vertical direction through the guide shaft 34 and the upper lifting plate 33, and drives the movable claw 211 to move in the radial direction of the rear pull chuck 21. At the same time, the movable claw 211 drives the rolling mechanism 5 to approach or move away from the plunger assembly 100.

[0055] refer to Figure 6 The bottom of the chuck pull rod 32 is sleeved with a pull rod bearing seat 36, and the pull rod bearing seat 36 is fixedly connected to the upper lifting plate 33, so that the chuck pull rod 32 and the upper lifting plate 33 can be detachably fixedly connected.

[0056] refer to Figure 4 , Figure 5 and Figure 8 The straight-pull driving mechanism 31 includes a motor mounting frame 311 fixed to the bottom of the frame 1, and a straight-pull motor 312 and a screw transmission mechanism 313 are arranged below the motor mounting frame 311. The bottom of the guide shaft 34 passes through the frame 1 and is connected to a lower lifting plate 35. The lower lifting plate 35 is connected to the screw transmission mechanism 313. The straight-pull motor 312 and the screw transmission mechanism 313 are connected through a transmission belt 314 to realize synchronous linkage. The screw transmission mechanism 313 rotates to drive the lower lifting plate 35 to move up and down in the vertical direction, thereby transmitting power through the guide shaft 34 and the upper lifting plate 33 to control the chuck pull rod 32 to move up and down in the vertical direction, thereby driving the active claw 211 on the rear pull chuck 21 to move along the radial direction of the rear pull chuck 21 through the inclined column sliding mechanism 212 inside the rear pull chuck 21 to realize inward closing or outward opening, and the active claw 211 drives the rolling mechanism 5 to approach or move away from the plunger assembly 100.

[0057] refer to Figure 4 and Fig. 9The motor shaft end of the direct-pull motor 312 is fixedly connected to a driving wheel 315, and the screw transmission mechanism 313 includes a ball screw 3131, a screw nut assembly 3132 sleeved on the outside of the ball screw 3131, a slider 3133 fixedly connected to the screw nut assembly 3132, and a slide rail 3134 slidably connected to the slider 3133 and vertically arranged. A connecting support plate 3135 is vertically fixedly connected to the lower side of the motor mounting frame 311, and the slide rail 3134 is fixed to the connecting support plate 3135. The screw nut assembly 3132 is fixedly connected to the lower lifting plate 35 through a rib plate 317. The top of the ball screw 3131 is fixedly connected to a driven wheel 316, and the driven wheel 316 is connected to the driving wheel 315 through a transmission belt 314.

[0058] refer to Figure 4 and Figure 6 The top of the ball screw 3131 is sleeved with a screw bearing seat 3136, and a ball bearing is sleeved between the ball screw 3131 and the screw bearing seat 3136, so as to reduce the friction between the ball screw 3131 and the screw bearing seat 3136 during the rotation process, and the screw bearing seat 3136 is fixedly connected to the motor mounting frame 311. The bottom of the connecting support plate 3135 is connected to the connecting bottom plate 3137, and the bottom of the ball screw 3131 is rotatably connected to the screw support seat 3138, and the screw support seat 3138 is fixedly connected to the connecting bottom plate 3137.

[0059] During operation, the straight-pull motor 312 drives the active wheel 315 to rotate, and drives the driven wheel 316 to rotate synchronously through the transmission belt 314, driving the ball screw 3131 to rotate along its own axis, and the screw nut assembly 3132 mounted on the outside of the ball screw 3131 moves up and down along the axial direction of the ball screw 3131, and the screw nut assembly 3132 drives the lower lifting plate 35 to move up and down in the vertical direction, thereby transmitting power through the guide shaft 34 and the upper lifting plate 33, controlling the chuck pull rod 32 to move up and down in the vertical direction, and driving the movable claw 211 and the rolling mechanism 5 to move along the radial direction of the rear pull chuck 21 to approach or move away from the plunger assembly 100.

[0060] refer to Figure 4 The chuck mechanism 2 also includes a chuck spindle 22 and a chuck bearing seat 23 coaxial with the rear chuck 21. The chuck spindle 22 is fixedly connected to the bottom of the rear chuck 21. The chuck pull rod 32 is coaxially arranged inside the chuck spindle 22. The chuck bearing seat 23 is sleeved on the outside of the chuck spindle 22. The chuck bearing seat 23 is fixedly connected to the frame 1. A coaxial synchronous pulley 24 is fixed to the bottom of the chuck spindle 22. The synchronous pulley 24 rotates synchronously with the chuck spindle 22. A three-phase asynchronous motor 6 is arranged on the side of the frame 1. The motor output shaft of the three-phase asynchronous motor 6 is connected to the synchronous pulley 24 through a synchronous belt 25 (refer to Figure 2The synchronous pulley 24 is driven by the three-phase asynchronous motor 6 to rotate around its own axis, driving the chuck main shaft 22 and the pull-back chuck 21 to rotate synchronously, and at the same time driving the rolling mechanism 5 to rotate circumferentially around the plunger assembly 100, spinning and closing the edge of the sliding shoe 102, so that the ball socket of the sliding shoe 102 and the ball head of the plunger 101 are tightly wrapped.

[0061] like Figure 4 As shown, a chuck ball bearing 26 is sleeved between the chuck bearing seat 23 and the chuck main shaft 22 to reduce the friction of the chuck main shaft 22 during the rotation process inside the chuck bearing seat 23 and improve the flexibility of rotation. A bearing end cover 27 and a locking ring 28 are provided at the bottom of the chuck ball bearing 26. The bearing end cover 27 is fixed to the bottom of the chuck bearing seat 23, and the locking ring 28 is sleeved on the outside of the chuck main shaft 22 and fixedly connected thereto, thereby limiting the installation position of the chuck ball bearing 26.

[0062] refer to Figure 1 and Figure 4 The frame 1 includes an upper fixing plate 11, a lower fixing plate 12 and four support columns 13. The upper and lower ends of the support columns 13 are fixedly connected to the upper fixing plate 11 and the lower fixing plate 12 respectively. The chuck bearing seat 23 penetrates the upper fixing plate 11, and the guide shaft 34 penetrates the lower fixing plate 12. A guide bearing seat 37 is sleeved between the guide shaft 34 and the lower fixing plate 12 to reduce the friction resistance and wear between the two. The upper lifting plate 33 is located between the upper fixing plate 11 and the lower fixing plate 12. The straight-pull driving mechanism 31 is arranged below the lower fixing plate 12, and the motor mounting frame 311 is fixedly connected to the lower fixing plate 12.

[0063] refer to Figure 6 The rolling mechanism 5 in the utility model includes a cutter head 51 and a rolling wheel 52. The cutter head 51 is fixedly connected to the movable claw 211. The rolling wheel 52 is arranged at one end of the cutter head 51 close to the plunger assembly 100, and is used to spin and close the plunger assembly 100.

[0064] refer to Fig.11 and Fig.12 The clamping mechanism 4 in the utility model includes a collet 41, a push rod 42 fixedly connected to the bottom of the collet 41, and a clamping height adjustment mechanism 43 connected to the push rod 42. The plunger assembly 100 is inserted into the collet 41. The clamping height adjustment mechanism 43 is connected to the frame 1 and is used to adjust the height position of the push rod 42 and the collet 41 in the vertical direction.

[0065] Among them, the clamping height adjustment mechanism 43 includes a clamping servo motor 431, a screw rod 432 connected to the output shaft of the clamping servo motor 431 and rotating synchronously, and a nut member 433 sleeved on the outside of the screw rod 432 and meshingly connected with the screw rod 432. The clamping servo motor 431 is fixedly connected to the frame 1, and both ends of the screw rod 432 are connected to the frame 1 through a screw rod mounting seat 434. A sliding seat 435 is fixedly connected to the top of the nut member 433. The left and right sides of the sliding seat 435 are respectively provided with oblique grooves parallel to each other, and a moving block 436 is horizontally penetrated in the oblique groove, and the moving block 436 is fixedly connected to the top rod 42.

[0066] The utility model drives the screw rod 432 to rotate by clamping the servo motor 431, thereby driving the nut member 433 and the sliding seat 435 to move forward and backward along the axial direction of the screw rod 432. At this time, relative movement occurs between the moving block 436 and the oblique notch of the sliding seat 435, so that the height position of the moving block 436 in the vertical direction can be adjusted. The moving block 436 drives the ejector rod 42 and the collet 41 to move up and down, thereby adjusting the clamping height of the plunger assembly 100 to make it correspond to the position of the spinning surface of the rolling wheel 52 in the rolling mechanism 5, so that it can be suitable for closing processing of plunger assemblies of different models and sizes.

[0067] When the straight-pull rotary feeding mechanism of the utility model is working:

[0068] (1) The clamping plunger assembly 100 is installed in the collet 41, and the screw 432 is driven to rotate by the clamping servo motor 431, thereby driving the sliding seat 435 to move along the axial direction of the screw 432, and the moving block 436 moves in the oblique groove of the sliding seat 435, thereby driving the ejector rod 42 and the collet 41 to move up and down, and adjusting the clamping height of the plunger assembly 100 to a suitable rolling height position.

[0069] (2) The synchronous pulley 24 is driven by the three-phase asynchronous motor 6 to drive the chuck main shaft 22 and the rear pull chuck 21 to rotate synchronously, thereby driving the rolling mechanism 5 to rotate circumferentially around the plunger assembly 100.

[0070] (3) At the same time, the direct-pull motor 312 drives the screw transmission mechanism 313 to rotate, driving the lower lifting plate 35 to move vertically downward, and transmitting power through the guide shaft 34 and the upper lifting plate 33 to drive the chuck pull rod 32 to move downward, thereby pulling the inclined column sliding mechanism 212 inside the rear-pull chuck 21 to move obliquely downward, and converting the vertical movement of the chuck pull rod 32 into driving the active claw 211 on the rear-pull chuck 21 to move along the radial direction of the rear-pull chuck 21. The active claw 211 drives the rolling mechanism 5 to close inward along the radial direction of the rear-pull chuck 21 to approach the plunger assembly 100. The direct-pull motor 312 can accurately control the feeding accuracy of the active claw 211, so that the rolling wheel 52 spins and closes the edge of the sliding shoe 102, so that the ball socket of the sliding shoe 102 and the ball head of the plunger 101 are tightly wrapped.

[0071] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Therefore, any technical solution that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A straight-pull rotary feed mechanism for a plunger assembly for spinning and closing, characterized in that: The invention comprises a frame (1), an internally hollow chuck mechanism (2) connected to the frame (1), a chuck straight-pull mechanism (3) arranged below the chuck mechanism (2), and a clamping mechanism (4) sleeved in the inner cavity of the chuck mechanism (2), wherein a plunger assembly (100) is clamped at the top of the clamping mechanism (4); The chuck mechanism (2) comprises a rear pull chuck (21), the top of the rear pull chuck (21) being provided with at least two movable claws (211) at equal intervals along the circumference, and each movable claw (211) being fixedly connected to a group of rolling mechanisms (5); The chuck straight-pull mechanism (3) comprises a straight-pull drive mechanism (31), a chuck pull rod (32), an upper lift plate (33) and a guide shaft (34); the straight-pull drive mechanism (31) is connected to the upper lift plate (33) by connecting the guide shaft (34); the chuck pull rod (32) is vertically sleeved on the outside of the clamping mechanism (4); the top of the chuck pull rod (32) extends into the inside of the rear pull chuck (21) to connect with the movable claw (211); and the bottom of the chuck pull rod (32) is connected to the upper lift plate (33); The straight-pull driving mechanism (31) drives the chuck pull rod (32) to move up and down in the vertical direction, and drives the movable claw (211) to move along the radial direction of the rear pull chuck (21), while the movable claw (211) drives the rolling mechanism (5) to move closer to or away from the plunger assembly (100).

2. A straight-pull rotary feed mechanism for a plunger assembly for spinning and closing a port according to claim 1, characterized in that: The straight-pull driving mechanism (31) comprises a motor mounting frame (311) fixed below the frame (1); a straight-pull motor (312) and a screw transmission mechanism (313) are provided below the motor mounting frame (311); the straight-pull motor (312) and the screw transmission mechanism (313) are connected via a transmission belt (314) to achieve synchronous linkage; the bottom of the guide shaft (34) passes through the frame (1) and is connected to a lower lifting plate (35); and the lower lifting plate (35) is connected to the screw transmission mechanism (313).

3. A straight-pull rotary feed mechanism for a plunger assembly for spinning and closing a port according to claim 2, characterized in that: The motor shaft end of the straight-pull motor (312) is fixedly connected to a driving wheel (315); the screw transmission mechanism (313) comprises a ball screw (3131), a screw nut assembly (3132) sleeved on the outside of the ball screw (3131), a slider (3133) fixedly connected to the screw nut assembly (3132), and a slide rail (3134) slidably connected to the slider (3133) and vertically arranged; a connecting support plate (3135) is vertically fixedly connected below the motor mounting frame (311); the slide rail (3134) is fixed on the connecting support plate (3135); the screw nut assembly (3132) is fixedly connected to the lower lifting plate (35) via a rib plate (317); a driven wheel (316) is fixedly connected to the top of the ball screw (3131); and the driven wheel (316) is connected to the driving wheel (315) via a transmission belt (314).

4. A straight-pull rotary feed mechanism for a plunger assembly for spinning and closing a port according to claim 3, characterized in that: The top of the ball screw (3131) is sleeved with a screw bearing seat (3136), and the screw bearing seat (3136) is fixedly connected to the motor mounting frame (311); the bottom of the connecting support plate (3135) is connected to a connecting base plate (3137), and the bottom of the ball screw (3131) is rotatably connected to a screw support seat (3138), and the screw support seat (3138) is fixedly connected to the connecting base plate (3137).

5. A straight-pull rotary feed mechanism for a plunger assembly for spinning and closing a port according to claim 1, characterized in that: A pull rod bearing seat (36) is sleeved and clamped on the bottom of the chuck pull rod (32), and the pull rod bearing seat (36) is fixedly connected to the upper lifting plate (33).

6. A straight-pull rotary feed mechanism for a plunger assembly for spinning and closing a port according to claim 1, characterized in that: The chuck mechanism (2) also includes a chuck spindle (22) and a chuck bearing seat (23) coaxial with the rear pull chuck (21); the chuck spindle (22) is fixedly connected to the bottom of the rear pull chuck (21); a chuck pull rod (32) is coaxially arranged inside the chuck spindle (22); the chuck bearing seat (23) is sleeved outside the chuck spindle (22); and the chuck bearing seat (23) is fixedly connected to the frame (1); A coaxial synchronous pulley (24) is fixed at the bottom of the chuck main shaft (22), and a three-phase asynchronous motor (6) is arranged on the side of the frame (1). The motor output shaft of the three-phase asynchronous motor (6) is connected to the synchronous pulley (24) through a synchronous belt (25).

7. A straight-pull rotary feed mechanism for a plunger assembly for spinning and closing a port according to claim 6, characterized in that: A chuck ball bearing (26) is sleeved between the chuck bearing seat (23) and the chuck main shaft (22); a bearing end cover (27) and a locking ring (28) are provided at the bottom of the chuck ball bearing (26); the bearing end cover (27) is fixed to the bottom of the chuck bearing seat (23); and the locking ring (28) is sleeved on the outside of the chuck main shaft (22) and fixedly connected thereto.

8. A straight-pull rotary feed mechanism for a plunger assembly for spinning and closing a port according to claim 6, characterized in that: The frame (1) comprises an upper fixing plate (11), a lower fixing plate (12) and four support columns (13); the upper and lower ends of the support columns (13) are respectively fixedly connected to the upper fixing plate (11) and the lower fixing plate (12); the chuck bearing seat (23) passes through the upper fixing plate (11); the guide shaft (34) passes through the lower fixing plate (12); a guide bearing seat (37) is sleeved between the guide shaft (34) and the lower fixing plate (12); the upper lifting plate (33) is located between the upper fixing plate (11) and the lower fixing plate (12); and the straight-pull driving mechanism (31) is arranged below the lower fixing plate (12).

9. A straight-pull rotary feed mechanism for a plunger assembly for spinning and closing a port according to claim 1, characterized in that: The rolling mechanism (5) comprises a cutter head (51) and a rolling wheel (52); the cutter head (51) is fixedly connected to the movable claw (211); the rolling wheel (52) is arranged at one end of the cutter head (51) close to the plunger assembly (100) and is used to spin and close the plunger assembly (100).

10. A straight-pull rotary feed mechanism for a plunger assembly for spinning and closing a port according to claim 1, characterized in that: The clamping mechanism (4) comprises a collet (41), a push rod (42) fixedly connected to the bottom of the collet (41), and a clamping height adjustment mechanism (43) connected to the push rod (42); the plunger assembly (100) is inserted into the collet (41); the clamping height adjustment mechanism (43) is connected to the frame (1) and is used to adjust the height position of the push rod (42) and the collet (41) in the vertical direction.

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